The EL 9000 B series are programmable electronic DC loads in a 19-inch 3U enclosure with input power ratings from 1.2 kW to 7.2 kW, voltages 0–80 V up to 0–750 V and currents up to 510 A per unit, expandable to 72 kW in cabinet systems. An FPGA-based digital control circuit provides CV, CC, CP and CR modes, an extensive function generator for arbitrary curves and a table-based XY function for simulating non-linear internal resistances. A multilingual colour touch panel, master-slave bus and Share bus for parallel and two-quadrant (source-sink) operation make the EL 9000 B well suited to power supply, battery and component testing.